Home | Reviews | Manufacturers | RockShox | Front Shock

Login  |  Register
RockShox Mag 20

MSRP $ 400.00
# of Reviews 10
Average Rating 4.4/5
More Products from RockShox

Submit a Review









Submitted by spdbmp66 a Racer from Covington, KY
Date Reviewed: October 11, 2009
Favorite Trail:Idlewild
Duration Product Used:More than 3 years
Purchased At:Mongomery Cyclery
Strengths:Steers straight, no flex
Weaknesses:short travel
Similar Products Used:Manitou 1
Bike Setup:GT Team Avalanche
Bottom Line:I Love this fork. I've been riding it off and on since '92 It rocked then and now!
Value Rating:3Overall Rating:5

Submitted by Glen a Weekend Warrior from SanDiego, CA USA
Date Reviewed: July 24, 2005
Favorite Trail:any that I can ride
Duration Product Used:2 Years
Price Paid: $350.00
Purchased At:a mail-order suspension place out in TN or KY if I remember right, bought back new back in '92
Strengths:This was the coolest shock out there at the time and it worked good, never had any porblems with it. Yeah the travel was short, but it rode straight and true like a rigid fork with the benefit of some big bump absorption. Made my aluminum hard tail Scott ride alot nicer than with the stock steel fork it came with :).
Weaknesses:Short travel, high price but it was the only thing like it so I guess high price could be expected.
Similar Products Used:none, first and only suspension fork I've ever owned. Have ridden a few nice bikes my friends had with upside down forks, rear suspension, etc (big time bikes for back in those days).
Bike Setup:'91 Scott Limited aluminum hard tail, built from ground up with lots of good components for those days. The Mag 20 was the crowning touch on the nicest bike I'd had. Rode it for 2 years till the bike was stolen from my garage in '94 and would probably still be riding it today if it hadn't been stolen.
Bottom Line:I was quite happy with the Mag 20 and never had a problem with it. I rode all sorts of desert and forest trails and fire roads with it and the fork was great for that. Probably not something I'd want for doing alot of jumping or downhill, but it's still a good old fork. I imagine a good used one would be pretty cheap these days, so I might find one or a Mag 21 to replace the 1" threaded steer rigid fork on the cheapie bike I've been riding for years since the Scott was stolen. I still have the old air pump for the Mag 20 too :).
Value Rating:3Overall Rating:3

Submitted by ratman a Weekend Warrior from dfw, tx
Date Reviewed: June 18, 2005
Favorite Trail:UTA campus
Duration Product Used:Less than 1 month
Price Paid: $75.00
Purchased At:ebay
Strengths:super adjustable, only good fork available nowadays with a 1" steerer tube, 3.1 lbs
Weaknesses:40-something mm of travel, stiction from hell, flexy. i heard forks with SN#'s 27266 through 158841 have fork crown recalls.
Bike Setup:blue Cannondale SM500 3.0 aluminum, w/ suntour xce and xc-1 7 spd pod shifters, ritchey wheels & tires, serfas dual denisty gel, ROCKSHOX MAG20
Bottom Line:i got these off ebay from some guy saying they were mag21s and in perfect condition, but they were actually mag20s with blown seals. After reseating the seals and lubing and adjusting air pressure, holy freakin crap these feel GOOD. yup, nothing compares to an air fork, even if the travel is only 45 mm. if you have a 1" head tube and are looking to upgrade to suspension, go with the MAG series. I built this bike for my girlfriend and she is pretty light, so if you are <130 lbs, run low pressure with 40mm of 2.5wt oil and remove the boots if you only ride dry conditions. If you are looking for replacement bushings or the LT kit, yo uare screwed b/c no one makes it anymore. www.enduroseals.com makes a MAG seal kit for all the mag series. 4 chilis only because I'm used to longer travel.
Value Rating:4Overall Rating:4

Submitted by Rick a Cross Country Rider from Danbury, CT USA
Date Reviewed: December 30, 2003
Favorite Trail:Steep Rock/Hidden Valley :-<
Duration Product Used:More than 3 years
Price Paid: $350.00
Purchased At:BikeExpress
Strengths:Simple, bulletproof, light, strong
Weaknesses:Not even close to plush
Similar Products Used:none
Bike Setup:Klein Pulse Team, RS Mag 20's, XTR, Joy Stix, Ringle SuperBubba & Super 8, Sun RinoLites, Velociraptor F&R, Bontrager Ti saddle, Scott LF-1 bars, Control Tech stem. (My bike's lighter than your bike, nah nah na nah nah)
Bottom Line:Bought these bad boys way back in '92. Used home made slider covers and wore our the seals in a season. My friend F-Tom at the "Bikes-A-Mess" got me an accordian style rubber cover and things have been happy since. A bunch of years ago, MTN Bike Action did an article on tuning/hopping up your Mag-20's and it made a world of difference. I can't seem to kill these forks! They have survived 3 frames, and countless hits. They are for big hits only, I don't think the word "Plush" was invented yet when these forks were born. Upped to an aluminum crown and steerer when I put 'em on the Pulse. Amazing thing is... they are over 10 years old and still going strong, go figure!
Value Rating:5Overall Rating:5

Submitted by Don a Weekend Warrior from Copperopolis, CA
Date Reviewed: February 18, 2003
Favorite Trail:any thing I can ride now
Duration Product Used:More than 3 years
Purchased At:came with bike
Strengths:This shock has lasted forever. I've riden it every weekend since 1992. Once you figure out your oil weight and height, you only have to play with the air pressure.
Weaknesses:needs more travel.
Similar Products Used:none, first and only shock i've owned up till now.
Bike Setup:old Univega with above bar thumb shifters and 21 speeds. pull star straight pull spokes and some no name rims. Big agressive tires and a troll on the handle bar.
Bottom Line:Love this shock so much I'm putting a Mag 21 on a Klein Mantra I just bought on e-bay. The Mag 20 is great. I've rebuilt this shock 3 times since '92. This shock has a lot of hard miles on it, and other than checking the air pressure every ride, I have to do nothing to this shock. Hope my new Mag 21 is as good of a shock.
Value Rating:5Overall Rating:5

Submitted by Kel a Cross Country Rider from Canada
Date Reviewed: March 22, 2002
Favorite Trail:Pembina Valley
Duration Product Used:More than 3 years
Price Paid: $250.00
Strengths:This has been a great fork, has stood the test of time through 3 rebuilds and a 2.5 inch travel kit. Its still light enough to compete with the new ones!!
Weaknesses:The seals leak and you have to adjust the pressure once in a while.
Similar Products Used:Judy, Indy SL, z1
Bike Setup:Norco Rampage XT/XTR!GO CANADA!!!
Bottom Line:One of the finest....a true classic
Value Rating:3Overall Rating:5

Submitted by kel cov a Cross Country Rider from ny
Date Reviewed: November 6, 2001
Duration Product Used:More than 3 years
Price Paid: $60.00
Purchased At:open road (Syracuse
Strengths:light,cheap,and its the next best thing to a rigid (perfect for NYC)
Weaknesses:seals are crap and cant find parts to rebuild (Fossle)
Similar Products Used:specialized RS1 judy sl and bed springs.
Bike Setup:commuter style (slicks)
Bottom Line:Ode' to the good ol' days..I still wear hiking boots with toe clips and florescent socks
Value Rating:3Overall Rating:3

Submitted by Juny Binamira a Weekend Warrior from Tagbilaran, Bohol, Philippines
Date Reviewed: April 23, 2000
Favorite Trail:between Maribojoc and Loon, Bohol
Duration Product Used:1 Year
Strengths:Lightweight, low maintenance
Weaknesses:short travel, tends to leak air pressure over time - I now pump it up every week.
Similar Products Used:none
Bike Setup:'94 GT timberline (18")
Bottom Line:I live way out in the sticks (Bohol, southern Philippines)
and though I could've afforded a SID a year back when I was
shopping for a fork, the best my local bike shop could find
me was this seven-year old Rock Shox Mag-20. I've been
quite happy with it though - it weighs only 3.1 lbs, which is still quite competitive with current high-end models.
Though it's got quite a bit of stiction, damping is good.
Sure could use a little more travel though.
I'm thinking of getting the SID SL for my next bike - a
2000 Specialized FSR XC frame that I'll build up.
Value Rating:3Overall Rating:4

Submitted by James a Racer from Austin TX
Date Reviewed: January 6, 2000
Favorite Trail:
Flat Creek
Duration Product Used:
2 Years
Strengths:
Its a suspension fork in a land of rigid forks(in 92).
Weaknesses:
travel
Similar Products Used:
Mag 21LT
97 Judy XC
98 Manitou Ti-SX
Bike Setup:
98 M2S-Works
Bottom Line:Man this fork was the sh*t in 92. Especially compared to that original Manitou with 1 1/4 in travel.
Overall Rating:5

Submitted by Bike Master Mike a Racer from Canton, MI
Date Reviewed: October 31, 1999
Favorite Trail:
Island Lake
Duration Product Used:
more than 3 years
Strengths:
Good Damping
Adjustable Spring Rate
Infinitely adjustable preload
Weaknesses:
Air caps leaked
Similar Products Used:
Mag 21 LT
Manitou FS
Judy XC
Judy XL
Indy SL LT
Bike Setup:
1991 Giant ATX 780, Full XT components
1998 Haro-fork was on this bike when it was stolen
Bottom Line:This was my first shock. It had magnesium lower legs that oxidized easily in small scratches on the lower legs. The upper legs were steel. The top caps were aluminum and the fork had 48 mm of travel. The mag 20 was Rock Shox 2nd fork, after the RS1. Their web site doesnt even mention this fork! Those bastards. There was also a Mag 30 model and it was similar to the 20, but it didnt have adjustable damping. The next forks were the Mag 21 and Mag 10. With the negative springs on the 1994 model Mag 21, this became my all time favorite fork. Its more adjustable that anything. It also had annodized aluminum upper legs and the lowers had a much better coating or perhaps a different alloy of magnesium. The lower legs on my 21s have never corroded like the 20s did. If you still ride a MAG 20, you rock dude.
Overall Rating:5






What's New
» BEST OF MTBR - Check out the highest rated bikes, parts, & gear!
» LED BIKE LIGHT SHOOTOUT 3 - We test all the newest products and latest light and battery technology in this comprehensive guide»
» INTERBIKE - See all the latest 2010 bikes, parts, and gear in our extensive Tradeshow Coverage»
Latest Articles and Reviews:


Quick Poll
(sponsored by Moots)
Do you own a GPS?

  yes, dedicated GPS
  yes, smart phone w/GPS
  not yet, but looking to buy
  no

Photo Caption Contest

(sponsored by Maxxis)

Enter here

Contact Us  •   About Us  •   Terms of Use  •   Privacy Policy  •   Advertising
 MtbREVIEW.com  RoadbikeREVIEW.com  OutdoorREVIEW.com
 PhotographyREVIEW.com  VideogameREVIEW.com  ComputingREVIEW.com
 AudioREVIEW.com  CarREVIEW.com  GolfREVIEW.com
Copyright ©1996-2009 All Rights Reserved.ConsumerREVIEW.com, a business unit of Invenda      RSS Feed